{
  "schema_version": "1.4.0",
  "id": "GHSA-528q-4pgm-wvg2",
  "modified": "2025-03-21T22:29:47Z",
  "published": "2025-03-21T22:29:47Z",
  "aliases": [],
  "summary": "Reflected XSS in go-httpbin due to unrestricted client control over Content-Type",
  "details": "### Description\n\nThe go-httpbin framework is vulnerable to XSS as the user can control the `Response Content-Type` from GET parameter. This allows attacker to execute cross site scripts in victims browser.\n\n### Affected URLs:\n- `/response-headers?Content-Type=text/html&xss=%3Cimg/src/onerror=alert(%27xss%27)%3E`\n- `/base64/PGltZy9zcmMvb25lcnJvcj1hbGVydCgneHNzJyk+?content-type=text/html`\n- `/base64/decode/PGltZy9zcmMvb25lcnJvcj1hbGVydCgneHNzJyk+?content-type=text/html`\n\n### Steps to reproduce:\n1. Visit one of the above mentioned URLs.\n2. XSS window will popup\n\n### Suggested fix\n- Allow Only Safe Content-Type Values Or give users option to define whitelisted Content-Type headers\n\n\n### Criticality\nThe following can be major impacts of the issue:\n* Access to victim's sensitive Personal Identifiable Information.\n* Access to CSRF token\n* Cookie injection\n* Phishing\n* And any other thing Javascript can perform",
  "severity": [
    {
      "type": "CVSS_V4",
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/mccutchen/go-httpbin"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.18.0"
            }
          ]
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/mccutchen/go-httpbin/v2"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.18.0"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/mccutchen/go-httpbin/security/advisories/GHSA-528q-4pgm-wvg2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mccutchen/go-httpbin/commit/0decfd1a2e88d85ca6bfb8a92421653f647cbc04"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/mccutchen/go-httpbin"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mccutchen/go-httpbin/releases/tag/v2.18.0"
    }
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "severity": "LOW",
    "github_reviewed": true,
    "github_reviewed_at": "2025-03-21T22:29:47Z",
    "nvd_published_at": null
  }
}